JP2001178857A - Putter-type golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a putter that can stabilize the rolling direction of a hit ball. SOLUTION: A putter-type golf club 1 has a head 2 with a face surface 4 for striking a ball B. At a crown part 5 that is connected to an upper edge 4a on the face surface 4 and at the same time forms the upper surface of the head, a center line Lc that is extended at right angles to the face surface 4 at a middle position CL in the direction of head length HL, a line Lt at a toe side and a line Lh at a heel side that are arranged linearly symmetrically with the center line Lc as a center and are parallel are formed. Distance X between the center line of the line Lt at the toe side and that of the line Lh at the heel side is set to 42.67 to 50.80 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a putter type golf club capable of stabilizing the rolling direction of a golf ball.

[0002]

2. Description of the Related Art To make a putt with a putter-type golf club, it is important to accurately roll the golf ball toward a target line. Although putting is always done carefully, it is well known from experience that rolling a golf ball along the target line imagined in the head is not easy even for a professional golfer. It is expected that a putter-type golf club having excellent directivity and capable of accurately launching a golf ball along the road will emerge.

FIG. 6 is a plan view of a head a of a conventional putter type golf club. The head a is connected to the upper edge of the face c on which the golf ball b is hit and the crown d forming the upper surface of the head, and for example, the intermediate position CL in the length direction along the face c of the head a is set to the head a. A center line e for a mark extending at right angles to the face surface c is provided (for example, JP-A-9-262323). In such a putter-type golf club, when the center line e is held along the target line g to the cup H and the ball is hit, the face c becomes perpendicular to the target line g, and the golf ball b is theoretically aimed at. It is possible to roll along the line g.

[0004] However, in the putter type golf club described above, many mispatts are actually generated. That is, since the center line is not usually drawn on the golf ball b, the center line e provided on the head a coincides with the center line j of the golf ball b (center line parallel to the target line g). Holding and hitting a ball requires a very skilled technique and is not easy for a general golfer. In the case of many golfers, the golf ball b is often hit at a position deviated to the toe side or the heel side from the center line e, so that the direction of the face surface c tends to change at the time of hitting, There is a problem that the rolling direction also deviates from the target line g.

Also, putter type golf clubs are usually
Since the thickness (the thickness in the vertical direction) of the face surface c is formed smaller than the diameter of the golf ball b, the probability that the face surface c hits the ball below the equator at the time of hitting is high,
There are also problems such as poor rolling of the golf ball.

The present invention has been devised in view of the above-described problems. A center line extending at an intermediate position of the head length at right angles to the face surface is provided on a crown portion of the head. A line on the toe side and a line on the heel side are arranged in line symmetry and parallel to the center line, and the distance between the center line of the line on the toe side and the center line of the line on the heel side is set. It is an object of the present invention to provide a putter-type golf club capable of greatly increasing the probability of accurately rolling a golf ball on a target line, based on a diameter of the ball being substantially 42.67 to 50.80 mm.

[0007]

According to a first aspect of the present invention, there is provided a putter-type golf club having a head having a face for hitting a ball, the putter-type golf club being continuous with an upper edge of the face. In the crown portion forming the upper surface of the head, a substantially middle position in the head length direction parallel to the face surface of the head is set at a center line extending perpendicular to the face surface, and at a line symmetrical position with respect to the center line. A toe-side line and a heel-side line are arranged and parallel to the center line, and the head length direction between the center line of the toe-side line and the center line of the heel-side line is provided. The distance X is set to 42.67 to 50.80 mm.

According to a second aspect of the present invention, the face surface has a face thickness Y of 42.67 to 50.80 mm at least at a substantially middle position of the head length. It is a putter type golf club of the description.

According to a third aspect of the present invention, the center line, the toe side line, and the heel side line are formed by grooves formed by denting the surface of the crown portion. 2. A putter-type golf club according to item 2.

According to a fourth aspect of the present invention, the center line, the toe side line, and the heel side line are formed in different colors from the surface of the crown portion. It is a putter type golf club.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a putter-type golf club of the present embodiment (hereinafter, may be simply referred to as “putter”).
1 is a partial perspective view, and FIG. 2 is a plan view thereof. In the figure, a putter 1 according to the present embodiment includes a head 2 having a face surface 4 which is a surface on which a golf ball B is hit.
And a shaft 3 having one end mounted on the head 2 and a grip provided on the other end.

The head 2 has a shape suitable for use mainly on a green, and in this embodiment, a solid and plate-shaped mallet type is exemplified. The head 2 of this example is
A crown portion 5 connected to the upper edge 4a of the face surface 4 and forming the upper surface of the head; a sole portion 7 connected to the lower edge 4b of the face surface 4 and forming the bottom surface of the head;
And a side portion 9 extending between the head portion and the sole portion 7, and in this example, is symmetrical in the toe and heel directions about a head intermediate position CL which is an intermediate position of a head length HL parallel to the face surface 4. Is exemplified.

The head 2 is preferably made of various metal materials such as aluminum, brass and stainless steel, and may be made of any other suitable material as long as it is harder than a golf ball. . Further, it may be configured as a composite in which a resin insert or the like is embedded in the face surface 4.

The head 2 of this embodiment has a center line Lc and a center line Lc
Is provided with a line Lt on the toe side and a line Lh on the heel side which are arranged so as to sandwich. In each of the lines Lc, Lt, and Lh, the putter 1 is a golfer.
When holding the ball or hitting the ball, if it is a linear pattern that can be identified, concave grooves, protruding ribs, coloring (paint), scoring lines, boundaries between different materials, shapes line,
Furthermore, it can be configured in various modes by a combination of two or more of these.

In the present embodiment, the center line Lc extends at the head intermediate position CL at right angles to the face surface 4. However, the center line Lc does not only strictly pass through the head intermediate position CL, but also has some errors,
For example, it can be arranged at a substantially intermediate position where the amount of deviation from the head intermediate position CL in the head length direction is within 5%, more preferably within 3% of the head length HL. The line Lt on the toe side and the line Lh on the heel side are arranged at line-symmetric positions with respect to the center line Lc, and extend in parallel with the center line Lc. The center line Lc of this example,
Both the toe side line Lt and the heel side line Lh extend from the upper edge 4 a of the face surface 4 to the back face side of the head 2. In the present example, the line Lt on the toe side and the line Lh on the heel side exemplify a line that continuously crosses the crown portion 5.
c is the line Lt on the toe side and the line Lh on the heel side
An example is shown in which the length is smaller than that and ends at the upper surface of the crown portion 5 with a break. However, it is not particularly limited to this mode.

In the present embodiment, each of the lines Lc, Lt, Lh is exemplified by a groove 6 formed by recessing the surface of the crown 5 at a small depth. Such concave grooves 6 are less likely to be caught, rubbed, or damaged, compared to, for example, a case where each line is formed of a rib body protruding from the surface of the crown portion 5, so that the lines are lost or lost. It helps to control the deterioration of appearance for a long time.

If the lines Lc, Lt, Lh can be identified as described above, their width, length, etc.
Although not particularly limited, for example, it is desirable that the width W (shown in FIG. 2) is 0.1 to 5 mm, preferably 0.2 to 3 mm, more preferably 0.5 to 2 mm, and the length is S (shown in FIG. 2) is 5 to 30 mm, more preferably 10 to 30 mm.
It is desirable to set it to about 30 mm. These dimensions may be the same or different for each line. When each line Lc, Lt, Lh is formed by the concave groove 6,
The groove depth is 0.1 to 5 mm, preferably 0.2 to 3 mm,
More preferably, the thickness is set to 0.5 to 2 mm. Further, each line of the present embodiment is exemplified by a line formed of the concave groove 6 and colored with a paint having a color different from the surface of the crown portion 5. Therefore, each line Lc, Lc
In addition to further improving the discriminability of t and Lh, the paint is applied to a position depressed from the surface of the crown portion 5,
Peeling of the coating film can be prevented over a long period of time, and the disappearance of the line can be more effectively prevented.

In this embodiment, the head length between the center line Ct passing through the center of the toe side line Lt in the width direction and the center line Ch passing through the center of the heel side line Lh in the width direction is set. The distance X in the direction is 42.67 to 50.80.
mm, that is, substantially equal to the diameter of the golf ball specified by the rules.

As shown in FIG. 2, the head 2 of the putter 1 may be set so as to sandwich the golf ball B between the center line of the line Lt on the toe side and the line Lh on the heel side when held. The golf ball B can be easily and naturally positioned easily and naturally at the head intermediate position CL on the face surface 4 by such an arrangement. Further, by aligning the center line Lc with the target line of the pad, the direction in which the ball is launched can be easily confirmed. Further, even at the time of impact, the golf ball can be easily hit at the intermediate position CL of the head 2 by the toe side line Lt and the heel side line Lh. Since the center of gravity of the head 2 is set at an intermediate position CL of the head as in the present example and as with many putters, the golf ball B is hit with the face surface 4 at such a position. Is difficult to change, and the golf ball can be accurately rolled on the target line.

When the distance X between the center line Ct of the line Lt on the toe side and the center line Ch of the line Lh on the heel side is less than 42.67 mm or exceeds 50.80 mm, the diameter X of the golf ball B is Is large, it is difficult to position the golf ball B at the intermediate position of the head 2, and it is difficult to stabilize the directionality of the hit ball.

The putter 1 of the present embodiment has a face thickness Y of at least the head intermediate position CL of the face surface 4 of 42.67 to 50.80 mm, that is, substantially equal to the diameter of the golf ball B defined by rules. Those set equally are illustrated. As a result, the center of the golf ball B and the middle position of the thickness of the face surface 4 are made to match with each other, so that the golf ball can be easily hit. The spin in the direction can be easily applied and the rolling of the ball can be improved.

The face thickness Y is 42.67 mm.
If it is less than 50 mm or more than 50.80 mm, the difference between the face thickness Y and the diameter of the golf ball B becomes large,
It becomes difficult to position the golf ball B at an intermediate position of the thickness of the head 2, and the stability of the sense of distance of the hit ball tends to decrease.

The embodiment of the present invention has been described above. For example, the head 2 is a so-called toe and heel type as shown in FIG. 3A, and the crown 5 has a step-like shape as shown in FIG. The present invention can also be applied to a device having a step. The present invention can be implemented in various modes, for example, the thickness of the face surface 4 can be configured so that the thickness gradually decreases in the toe and heel directions from the intermediate position of the head.

[0024]

EXAMPLES Hereinafter, more specific examples of the present invention will be described, and the effects thereof will be clarified. First, FIG.
(C) A prototype of the head 2 and a steel shaft 3 having a rubber grip (not shown) attached thereto.
Into the putter 1 by incorporating the rolling direction of the hit ball,
A test hit test 1 for measuring the direction of the face surface 4 when hitting a ball was performed. The putter used had the same shape for the head, shaft and grip, and as shown in FIG.
A different line is used only for the line Lt on the toe side and the line Lh on the heel side. In Comparative Example 2, the line Lt on the toe side,
The distance between the center lines of the heel side line Lh is 42.67 mm
In Comparative Example 1, the line Lt on the toe side and the line Lh on the heel side are not provided. The width of each line is 2
mm and a depth of 1 mm. Each of the face thicknesses Y was 30 mm.

In the test hit test 1, ten golfers (handicap: 2 to 17) put a ball five times using the test clubs, aiming at the cup 8 m away from the golf club, and set the starting point of the ball and the cup. And the angle of the face surface 4 at impact (the angle of the face surface with respect to a line segment perpendicular to the target line) from the target line connecting the target line to the position where the ball stops, and the data The evaluation was performed with an average value of five times. The smaller the shift amount, the better, and the angle of the face surface is better to be closer to 0 °. Table 1 shows the test results.

[0026]

[Table 1]

Next, as a test hit test 2, FIGS.
As shown in (C), a putter having only a different face thickness was prototyped, and ten golfers (handicap:
Each of the test clubs 2 to 17) performed putting five times using the test clubs, aiming at a cup 8 m away, measured the variation in the rolling distance, and evaluated the average value of each data five times. The shape of the crown portion was the same as that of FIG. Table 2 shows the test results.

[0028]

[Table 2]

Next, the putter shown in FIG. 4C was colored according to the specifications shown in Table 3, and the same test as Test Test 1 was performed. Table 3 shows the test results and the like.

[0030]

[Table 3]

[0031]

As described above, according to the present invention, in the crown portion of the head, a center line extending substantially at an intermediate position of the head length at right angles to the face surface and a line symmetrical position with respect to the center line are arranged. In addition, a line on the toe side and a line on the heel side parallel to the center line are provided, and the distance between the center line of the line on the toe side and the center line of the line on the heel side is substantially equal to the diameter of the ball, that is, 42. .67
When the thickness is set to 50.80 mm, the golf ball can be easily hit in the middle of the face surface, and the rolling of the ball can be accurately controlled. Accordingly, the probability of accurately rolling the hit ball on the target line can be greatly increased.

The face thickness Y at least at the intermediate position of the head on the face surface is set to 42.67 to 50.80 m.
m, that is, when set to be substantially equal to the diameter of the golf ball, the center of the golf ball and the middle position of the thickness of the face surface are matched to make it easier to hit the ball. In addition to being stable, a forward spin can be easily applied to the hit ball, and the rolling of the ball can be improved.

[Brief description of the drawings]

FIG. 1 is a partial perspective view of a putter showing an embodiment of the present invention.

FIG. 2 is a plan view thereof.

FIGS. 3A and 3B are partial perspective views of a putter showing another embodiment.

FIGS. 4A to 4C are plan views showing a head according to an embodiment.

FIGS. 5A to 5C are front views showing the head of the embodiment.

FIG. 6 is a plan view illustrating a conventional technique.

[Explanation of symbols]

Reference Signs List 1 putter type golf club 2 head 3 shaft 4 face surface 5 crown portion 6 concave groove Lc center line Lt toe side line Lh heel side line CL Head intermediate position X center line of toe side line and center of heel side line Distance between lines

Claims (4)

[Claims] 1. A putter-type golf club having a head having a face surface for hitting a ball, wherein a crown portion connected to an upper edge of the face surface and forming a head upper surface has a face of the head. A center line extending substantially perpendicularly to the face surface at a substantially middle position in the head length direction parallel to the surface; a toe line and a heel side arranged at a line symmetrical position about the center line and parallel to the center line. And the distance X in the head length direction between the center line of the toe side line and the center line of the heel side line is 42.6.
A putter type golf club having a thickness of 7 to 50.80 mm. 2. The face surface has a face thickness Y of at least approximately 42.67 to 5 at a substantially middle position of the head length.
The putter-type golf club according to claim 1, wherein the golf club is 0.80 mm. 3. The putter-type golf club according to claim 1, wherein the center line, the toe-side line, and the heel-side line are grooves formed by recessing the surface of the crown portion. . 4. The putter-type golf club according to claim 3, wherein the center line, the toe side line, and the heel side line are formed in different colors from the surface of the crown portion.